Cooler



FIG. 1 is a front right perspective view of a cooler showing our new design;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a right view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in the drawings are directed to environment, and are for informational purposes only and form no part of the claimed design. 

The ornamental design for a cooler, as shown and described. 